BALTIMORE — The Astros have standing offers for No. 1 starter Bud Norris but are hoping a team increases its pitch during the final hours before a 3 p.m. CT non-waiver trade deadline, a league source with knowledge of negotiations said Wednesday morning.

Pittsburgh, Baltimore and Arizona have shown recent interest in Norris and a fourth team could come through as late candidate.

The offers the Astros have received are “pretty soft,” the source said. As a result, the organization is waiting the situation out with the belief a club could meet its demands in a last-minute scenario.

“I still think he’s gone and he’ll be traded,” the source said.

Pittsburgh (64-42, first in NL Central and MLB) has the best farm system and could offer the best minor league value in return.

Baltimore (59-48, third in AL East) has maintained consistent tabs on Norris and still showed interest as of late Tuesday. The Orioles are reluctant to overpay, though.

Arizona (54-52, second in NL West) is 4-6 in its last 10 games and losing ground to the Los Angeles Dodgers. The Diamondbacks had cooled off on Norris as of late Tuesday but have shown interest in the righthander for at least a month and could be a late fallback option. Arizona has pitching depth, though, and is reportedly attempting to deal starter Ian Kennedy.

Norris is still under club control the next two seasons. The Astros entered the week knowing they don’t have to trade him but a deadline-day deal would be the most likely resolution to 10 months’ worth of trade rumors. While Norris has expressed an interest in moving on from the only MLB team he’s played for in the hope of joining a contender, the Astros are unlikely to lower their asking price just to move him and prevent what could become a challenging clubhouse situation.

Norris informally said his goodbyes to Astros beat writers postgame Tuesday but acknowledged he had no idea where things stood concerning his immediate future and was unsure if he’d be in an Astros uniform Wednesday.

The market for Norris hasn’t matched the interest in starters Jake Peavy and Matt Garza, who were traded the same day they were scratched.

Norris was scratched Tuesday from a scheduled start. He was with the Astros throughout the game, though, and is expected to start Wednesday against the Orioles if he’s not traded.

As of 9 a.m. Wednesday, discussions about Norris had not reheated and the Boston Globe’s Nick Carfado reported there was “very little action.”

The Red Sox were removed as a potential landing spot for Norris after Boston acquired Peavy late Tuesday.

Update (10:47 a.m.): Norris has been linked with the Braves and again with the Orioles, with talks reportedly picking up.

A source said the Braves were previously “out” on Norris.

Update (11:23 a.m.):Peter Gammons reports Norris continues to receive a “lot of interest,” with the Pirates and San Francisco Giants driving talks while the Diamondbacks and Rangers are showing interest.